High-frequency heating equipment

Abstract

A high-frequency heating equipment includes temperature sensor ( 21 ) that is mounted with mounting bracket ( 22 ) such that temperature sensor ( 21 ) can be pressed by a lateral face of cooling fins and an end of temperature sensor ( 21 ) points to an anode of magnetron ( 3 ). This structure allows positively preventing magnetron ( 3 ) from falling into a thermal runaway which invites a breakdown of magnetron ( 3 ), and allows determining in a reliable manner whether the operation is a no-load running or a light-load running. The high-frequency heating equipment thus achieves stable performance.

1 . A high-frequency heating equipment comprising:
 a heating chamber for accommodating an object to be heated;   a magnetron including a plurality of cooling fins and radiating an electromagnetic wave into the heating chamber;   a power supply for driving the magnetron;   a cooling fan for cooling the magnetron and the power supply;   a temperature sensor for sensing a temperature of the magnetron;   a mounting bracket holding the temperature sensor;   an air guide for guiding an airflow supplied by the cooling fan; and   a controller for controlling the power supply, the magnetron, and the cooling fan,   wherein the temperature sensor is mounted with the mounting bracket such that the temperature sensor is pressed by a lateral face of the cooling fins and an end of the temperature sensor points to an anode of the magnetron on the downwind side of the cooling fan.   
     
     
         2 . The high-frequency heating equipment of  claim 1 , wherein the mounting bracket restricts the airflow from the cooling fan to the temperature sensor. 
     
     
         3 . The high-frequency heating equipment of  claim 1 , wherein the mounting bracket is clamped between a yoke of the magnetron and the air guide disposed on the downwind side of the cooling fan. 
     
     
         4 . The high-frequency heating equipment of  claim 1 , wherein the mounting bracket is mounted inside of both ends at one side of the cooling fins.